SKF 21139A Automatic Transmission Seal - Rear
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SKF

SKF 21139A Automatic Transmission Seal - Rear

Brand SKF 21139A
Position Rear
Fits Dodge · 8 vehicles

Premium materials. Built with a polyacrylate sealing surface for dependable sealing performance.

Seal design. Keeps lubricants in and contaminants out.

Transmission seal. A sealing component for automatic transmission applications.

Cross-references National 100796 and SKF 21139A for the same application. See all 2.

$20.45Free shipping
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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Automatic Transmission Seal options

SKF Automatic Transmission Seal 21139A

SKF 21139A is an automatic transmission seal built for rear applications on select Dodge Ram trucks. With a polyacrylate sealing surface and precise dimensions, it is made to help maintain transmission fluid control where shaft and housing tolerances matter.

  • Part number 21139A automatic transmission seal
  • Outside diameter: 2.979 in.
  • Shaft diameter: 2.160 in.
  • Width: 1.515 in.
  • Polyacrylate sealing surface type
  • Fits rear transmission applications on select Dodge Ram 1500, Ram 2500, and Ram 3500 models

Application Details

This SKF transmission seal is specified for rear placement on 2003-2005 Dodge Ram 2500, 2003-2005 Dodge Ram 3500, and 2004-2005 Dodge Ram 1500 models. If you are searching for a rear automatic transmission seal for Dodge Ram 1500, Ram 2500, or Ram 3500 trucks, part number 21139A matches the listed fitment and dimensions for those applications. This part cross-references National 100796 for the same application.

What It Helps Address

  • Transmission fluid seepage at the seal interface
  • Contamination entering the transmission through a worn seal
  • Leak-related low fluid condition
  • Seal wear from age, heat, and fluid exposure
  • Fitment issues when replacing a damaged rear transmission seal

Installation Notes

Verify shaft diameter, outside diameter, and width before installation to confirm the seal matches the transmission assembly. Inspect the sealing surface, shaft, and housing for scoring or wear before installing SKF 21139A. Clean all mating surfaces thoroughly and follow the vehicle service procedure for rear transmission seal replacement on the applicable Dodge Ram model.

Quality Assurance

SKF has a long history in seal engineering, including early integrated shaft seal development and continued refinement of sealing designs and bonding methods. SKF manufactures seals to specific application requirements using premium materials and quality-controlled processes for long service life and dependable fluid retention.

This part fits 8 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2005DodgeRam 1500Rear—
2005DodgeRam 2500Rear—
2005DodgeRam 3500Rear—
2004DodgeRam 1500Rear—
2004DodgeRam 2500Rear—
2004DodgeRam 3500Rear—
2003DodgeRam 2500Rear—
2003DodgeRam 3500Rear—
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
National — 100796SKF — 21139A